Question

Find $\mathrm {E} (X), \mathrm {Var} (X)$.

score 77 · Answer 1 · 2018-08-05 08:04:23

Find $\mathrm {E} (X), \mathrm {Var} (X)$.

Published on 05 Aug 2018 - 8:04

score 2.5k · Answer 2 · 2018-08-07 07:13:45

A continuous random variable X has a uniform distribution over some interval [L, R] with mean $7$ and variance $3$ (i.e. $E(X) = 7$ and $Var(X)=3$).

score 56 · Answer 3 · 2018-08-07 09:04:07

56

Views

Variance of a CDF with built in functions with two independent generic Poisson random variables

Published on 07 Aug 2018 - 9:04

score 42 · Answer 4 · 2018-08-08 00:32:02

42

Views

Finding $Var(X)$ without integrating

Published on 08 Aug 2018 - 0:32

score 63 · Answer 5 · 2018-08-08 08:18:19

$X\sim\mathrm{Poisson}(\lambda_1 = 5)$ and $Y\sim\mathrm{Poisson}(\lambda_2 = 15)$. Let $Z = X + Y$ . Compute $\mathrm{Corr}(X, Z)$.

score 395 · Answer 6 · 2026-03-25 09:31:45

395

Views

Autocovariance equal to variance

Published on 25 Mar 2026 - 9:31

score 134 · Answer 7 · 2018-08-10 23:32:40

134

Views

Compute $Var(X)$ with Gamma distribution

Published on 10 Aug 2018 - 23:32

score 136 · Answer 8 · 2026-03-25 22:09:49

136

Views

Finding the Probability when the variance , sample mean and a different sample size is given

Published on 25 Mar 2026 - 22:09

score 910 · Answer 9 · 2018-08-17 16:45:03

910

Views

Truncated variance less than variance?

Published on 17 Aug 2018 - 16:45

score 339 · Answer 10 · 2026-03-25 14:25:11

Trimmed mean: Take $n$ i.i.d. Gaussians and remove largest $m$ and smallest $m$ points. What is the variance of the mean of the remaining points?

score 4.9k · Answer 11 · 2026-03-25 11:20:13

4.9k

Views

Show that the sample variance is an unbiased estimator of $\lambda$ for the Poisson distribution

Published on 25 Mar 2026 - 11:20

score 78 · Answer 12 · 2018-08-19 03:27:18

78

Views

Variance of squared $l_2$ distance ratio

Published on 19 Aug 2018 - 3:27

score 414 · Answer 13 · 2018-08-22 17:23:32

414

Views

Variance of a doubly truncated normal distribution

Published on 22 Aug 2018 - 17:23

score 252 · Answer 14 · 2026-03-26 01:10:31

252

Views

Compute the variance of $\bar X$ given $\mathrm{Cov}[X_i,X_j]$

Published on 26 Mar 2026 - 1:10

score 53 · Answer 15 · 2018-08-26 23:22:31

53

Views

Variance of Ito Integral when the integrand is a function of a different Wienner process

Published on 26 Aug 2018 - 23:22

List Question

Find $\mathrm {E} (X), \mathrm {Var} (X)$.

A continuous random variable X has a uniform distribution over some interval [L, R] with mean $7$ and variance $3$ (i.e. $E(X) = 7$ and $Var(X)=3$).

Variance of a CDF with built in functions with two independent generic Poisson random variables

Finding $Var(X)$ without integrating

$X\sim\mathrm{Poisson}(\lambda_1 = 5)$ and $Y\sim\mathrm{Poisson}(\lambda_2 = 15)$. Let $Z = X + Y$ . Compute $\mathrm{Corr}(X, Z)$.

Autocovariance equal to variance

Compute $Var(X)$ with Gamma distribution

Finding the Probability when the variance , sample mean and a different sample size is given

Truncated variance less than variance?

Trimmed mean: Take $n$ i.i.d. Gaussians and remove largest $m$ and smallest $m$ points. What is the variance of the mean of the remaining points?

Show that the sample variance is an unbiased estimator of $\lambda$ for the Poisson distribution

Variance of squared $l_2$ distance ratio

Variance of a doubly truncated normal distribution

Compute the variance of $\bar X$ given $\mathrm{Cov}[X_i,X_j]$

Variance of Ito Integral when the integrand is a function of a different Wienner process

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